AN ANALYSIS of CHANDRA DEEP FOLLOW-UP GAMMA-RAY BURSTS: IMPLICATIONS for OFF-AXIS JETS

Bin Bin Zhang; Hendrik Van Eerten; David N. Burrows; Geoffrey Scott Ryan; Philip A. Evans; Judith L. Racusin; Eleonora Troja; Andrew Macfadyen

doi:10.1088/0004-637X/806/1/15

AN ANALYSIS of CHANDRA DEEP FOLLOW-UP GAMMA-RAY BURSTS: IMPLICATIONS for OFF-AXIS JETS

Bin Bin Zhang, Hendrik Van Eerten, David N. Burrows, Geoffrey Scott Ryan, Philip A. Evans, Judith L. Racusin, Eleonora Troja, Andrew Macfadyen

Research output: Contribution to journal › Article › peer-review

Abstract

We present a sample of 27 gamma-ray bursts (GRBs) with detailed Swift light curves supplemented by late-time Chandra observations. To answer the missing jet-break problem in general, we develop a numerical-simulation-based model that can be directly fit to the data using Monte Carlo methods. Our numerical model takes into account all the factors that can shape a jet break: (i) lateral expansion, (ii) edge effects, and (iii) off-axis effects. Our results provide improved fits to the light curves and constraints on physical parameters. More importantly, our results suggest that off-axis effects are important and must be included in interpretations of GRB jet breaks.

Original language	English (US)
Article number	15
Journal	Astrophysical Journal
Volume	806
Issue number	1
DOIs	https://doi.org/10.1088/0004-637X/806/1/15
State	Published - Jun 10 2015

Keywords

gamma-ray burst: general
methods: numerical

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1088/0004-637X/806/1/15

Cite this

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title = "AN ANALYSIS of CHANDRA DEEP FOLLOW-UP GAMMA-RAY BURSTS: IMPLICATIONS for OFF-AXIS JETS",

abstract = "We present a sample of 27 gamma-ray bursts (GRBs) with detailed Swift light curves supplemented by late-time Chandra observations. To answer the missing jet-break problem in general, we develop a numerical-simulation-based model that can be directly fit to the data using Monte Carlo methods. Our numerical model takes into account all the factors that can shape a jet break: (i) lateral expansion, (ii) edge effects, and (iii) off-axis effects. Our results provide improved fits to the light curves and constraints on physical parameters. More importantly, our results suggest that off-axis effects are important and must be included in interpretations of GRB jet breaks.",

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AU - Zhang, Bin Bin

AU - Eerten, Hendrik Van

AU - Burrows, David N.

AU - Ryan, Geoffrey Scott

AU - Evans, Philip A.

AU - Racusin, Judith L.

AU - Troja, Eleonora

AU - Macfadyen, Andrew

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AB - We present a sample of 27 gamma-ray bursts (GRBs) with detailed Swift light curves supplemented by late-time Chandra observations. To answer the missing jet-break problem in general, we develop a numerical-simulation-based model that can be directly fit to the data using Monte Carlo methods. Our numerical model takes into account all the factors that can shape a jet break: (i) lateral expansion, (ii) edge effects, and (iii) off-axis effects. Our results provide improved fits to the light curves and constraints on physical parameters. More importantly, our results suggest that off-axis effects are important and must be included in interpretations of GRB jet breaks.

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AN ANALYSIS of CHANDRA DEEP FOLLOW-UP GAMMA-RAY BURSTS: IMPLICATIONS for OFF-AXIS JETS

Abstract

Keywords

ASJC Scopus subject areas

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